package com.bdqn.gulimall.member.exception;

/**
 * 自定义异常
 */
public class UserNameExistException extends RuntimeException {
    /**
     * Constructs a new runtime exception with {@code null} as its
     * detail message.  The cause is not initialized, and may subsequently be
     * initialized by a call to {@link #initCause}.
     */
    public UserNameExistException() {
        super("用户名已存在");
    }
}
